no auto for network interface?

[Zach]

Can anyone tell me how to configure my /etc/network/interfaces file to
*not* configure an interface automatically on boot?

the following entry is in my interfaces file for eth0
iface eth0 inet dhcp
which I believe is correct, since I want eth0 to be configured with dhcp.

I do not have an auto entry for eth0, yet it still is configured
automatically on boot, if the network cable is connected.  I only want
to bring it up explicitly, because I have to bring down eth1 first?

Aside from not connecting the network cable, how can I have it not
brought up automatically?

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